Non-hydraulic tappet. Weight 86 grams each. Must be used with 53-84 B.T. hydraulic style tappet blocks (available in polished billet aluminum from Jims as MCS 520033). Note: Must fabricate your own pushrods. Required length unknown at JIMS and depending on engine and cam. JIMS 517746 adjuster screw set & 513466 locknut set must be purchased separately. Note: Standard O.D. is .731".
Non-hydraulic tappet. Weight 86 grams each. Must be used with 53-84 B.T. hydraulic style tappet blocks (available in polished billet aluminum from Jims as MCS 520033). Note: Must fabricate your own pushrods. Required length unknown at JIMS and depending on engine and cam. JIMS 517746 adjuster screw set & 513466 locknut set must be purchased separately. Note: Standard O.D. is .731".
Hidden mount screws; billet 7075-T651 aluminum and exact positioning to the centerline of the cam bushing and pinion bushing within .0002". Features improved breathing; which is good for stock and even better for high performance applications. A positive two O-ring seal systems will keep oil where it belongs. These JIMS 2-piece gear covers are among the best made. Note: For replacement o-rings see 978025 (small) and 978026 (large).
Jims PowerglideT tappets will give you a superior hydraulic function when compared with OEM style equipment; a billet steel body with hand-honed hydraulic unitcavity and an oil fed axle. To get full power; you must have zero valve lash and eliminate collapsing of the hydraulic unit as is found in the OEM unit; also called ''the shock absorber syndrome''. Failing to keep the valve open the full amount results in power loss. The Jims Powerglide tappets come as close to a solid tappet as possible; but are still able to compensate for heat expansion. They will even work well with solid style camshafts. Weight 149 grams each. Fits as an oversized diameter improved replacement for OEM 18523-86A. Note: Standard size is .8425" O.D.
The hydraulics used will work with both hydraulic and solid style camshafts. An excellent replacement hydraulic tappet for stock and high performance applications. Made as an oversized diameter replacement for 17920-53A (hydraulic unit) and 18522-53A (tappet). Note: Standard O.D. is .731". Note: Upgrading 66-84 Shovels to JIMS pushrods? Use the MCS 978053 JIMS Powerglide upgrade kit. JIMS Note: some 78-84 H-Dr tappet blocks have oil drain hole location problems with some high lift cams.
The hydraulics used will work with both hydraulic and solid style camshafts. An excellent replacement hydraulic tappet for stock and high performance applications. Made as an oversized diameter replacement for 17920-53A (hydraulic unit) and 18522-53A (tappet). Note: Standard O.D. is .731". Note: Upgrading 66-84 Shovels to JIMS pushrods? Use the MCS 978053 JIMS Powerglide upgrade kit. JIMS Note: some 78-84 H-Dr tappet blocks have oil drain hole location problems with some high lift cams.
Clearanced up to about .700" lift cams; still clearance with performance cams must be checked. Weight 143 grams each. Jims PowerglideT tappets will give you a superior hydraulic function when compared with OEM style equipment; a billet steel body with hand-honed hydraulic unitcavity and an oil fed axle. To get full power; you must have zero valve lash and eliminate collapsing of the hydraulic unit as is found in the OEM unit; also called ''the shock absorber syndrome''. Failing to keep the valve open the full amount results in power loss. The Jims Powerglide tappets come as close to a solid tappet as possible; but are still able to compensate for heat expansion. They will even work well with solid style camshafts. Fits as an oversized improved replacement for OEM 18526-89. Note: Standard diameter is .9035".
Clearanced up to about .700" lift cams; still clearance with performance cams must be checked. Weight 143 grams each. Jims PowerglideT tappets will give you a superior hydraulic function when compared with OEM style equipment; a billet steel body with hand-honed hydraulic unitcavity and an oil fed axle. To get full power; you must have zero valve lash and eliminate collapsing of the hydraulic unit as is found in the OEM unit; also called ''the shock absorber syndrome''. Failing to keep the valve open the full amount results in power loss. The Jims Powerglide tappets come as close to a solid tappet as possible; but are still able to compensate for heat expansion. They will even work well with solid style camshafts. Fits as an oversized improved replacement for OEM 18526-89. Note: Standard diameter is .9035".
Must be used with adjustable pushrods. Jims ''Hydrosolid'' tappets have broken the limitations of all previous hydraulic tappet designs and is the best Jims tappet that is offered. This tappet works like a hydraulic tappet to about 5500 RPM; and then turns into a solid al the way up to where your rev. limiter takes control. At the time it turns into a solid the Jims Hydrosolid will add 3-6 horsepower. Even when the tappet rollers start lifting of the back of your cam you can be sure the Jims hydrosolid will never pump-up. Note: Must be used with adjustable pushrods. Note: Standard O.D. size is .8425".
Must be used with adjustable pushrods. Jims ''Hydrosolid'' tappets have broken the limitations of all previous hydraulic tappet designs and is the best Jims tappet that is offered. This tappet works like a hydraulic tappet to about 5500 RPM; and then turns into a solid al the way up to where your rev. limiter takes control. At the time it turns into a solid the Jims Hydrosolid will add 3-6 horsepower. Even when the tappet rollers start lifting of the back of your cam you can be sure the Jims hydrosolid will never pump-up. Note: Must be used with adjustable pushrods. Note: Standard O.D. size is .8425".
+.002 inch oversize. OEM style replacement tappet only; without the hydraulic unit. A stock type hydraulic unit must be (re)used or purchased separately. Weight 89 grams each. Note: Standard O.D. is 731".
+.005 inch oversize. OEM style replacement tappet only; without the hydraulic unit. A stock type hydraulic unit must be (re)used or purchased separately. Weight 89 grams each. Note: Standard O.D. is 731".
Tappet is not adjustable; must therefore be used with an adjustable type pushrod. Tappet weight 109 grams each. Note: Standard outside diameter is .8425".
Tappet is not adjustable; must therefore be used with an adjustable type pushrod. Tappet weight 109 grams each. Note: Standard outside diameter is .8425".
Fits 57-85 Sportster models as a stock replacement tappet. Replaces an +.002" oversized version of OEM 18508-52B. Note: 517748 adjusting screw with 5/16" ball-end and 513466 lock nut are required and sold separately. Note: Standard O.D. is .731".
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